PRO grab_info, unit, name, x_dim, y_dim, xc, yc, radius, maxzd, $
   rot, alt, glat, glong, hl
; INPUT:
;   unit
; OUTPUTS:
;   name     Name of file containing all-sky image
;   x_dim    X dimension of image
;   y_dim    Y dimension of image
;   xc, yc   PIXEL coordinates for the center field of view for
;             the image
;   radius   PIXEL radius to the edge of the field of view
;   maxzd    Zenith distance associated with edge of the field
;             of view
;   rot      Rotation of the CCD image plane y-axis away from
;             geographic north
;   alt      Altitude of all-sky camera (km)
;   glat     Geodetic latitude of camera
;   glong    Geographic longitude of camera (deg East)
;   hl       Centroid height of the emission layer to be mapped
;                READ THE FILENAME
name = ''
str = ''
offset = 35
READF,unit,str
; Skip lines beginning with ";"
WHILE(STRMID(str,0,1) EQ ";") DO READF,unit,str
name = STRTRIM(STRMID(str,offset,STRLEN(str)-offset),2)

x = read_real(unit,offset)
x_dim = LONG(x)
x = read_real(unit,offset)
y_dim = LONG(x)

x = read_real(unit,offset)
xc = LONG(x)
x = read_real(unit,offset)
yc = LONG(x)

x = read_real(unit,offset)
radius = LONG(x)

maxzd = read_real(unit,offset)

rot = read_real(unit,offset)

alt = read_real(unit,offset)
glat = read_real(unit,offset)
glong = read_real(unit,offset)

hl = read_real(unit,offset)
end